Assist voice recognition doesn't work with USB microphone on macOS companion App

Hello 👋

**Device model, version and app version**

Model Name: Apple M3 Pro
macOS Version: Tahoe 26.1
App Version: 2025.11.2 (2025.1537)
Safari Version: Version 26.1 (21622.2.11.11.9)

**Home Assistant Core Version**
2025.12.5

**Describe the bug**

On the macOS companion application, when I try to speak with assist, I get a "No text recognized" error.
I've looked at the logs and I see this error that seems related:

```
Enregistreur: homeassistant.components.cloud.stt
Source: components/cloud/stt.py:119
intégration: Home Assistant Cloud ([documentation](https://www.home-assistant.io/integrations/cloud), [problèmes](https://github.com/home-assistant/core/issues?q=is%3Aissue+is%3Aopen+label%3A%22integration%3A+cloud%22))
S'est produit pour la première fois: 12:04:07 (6 occurrences)
Dernier enregistrement: 12:04:21

Voice error: Error processing fr-FR speech: 400 Invalid HTTP request.
```

I've tried using the website version via Chrome and it correctly works.
I also tried changing my microphone, switching from an USB one to the built-in one. While USB is failing, built-in is correctly picked-up.

The permission for microphone access are correctly set.

**To Reproduce**

Open the app, click the assist microphone icon and talk to it.

**Expected behavior**

Voice recognition should work.

**Screenshots**

**Additional context**